In the individuals sense, arguments are not really a bad thing. If it weren't for arguments, we'd never have gotten anywhere, as far as science is concerned. If the original scientists hadn't argued with each other they would have never known what was right.

However, as a great man once said, "War does not determine who is right, it determines who is left."

Arguments over things such as race and religion do not serve humanity in any good way at all, and thus need to be eliminated if we ever hope to show the true potential of the human race. One way to eliminate such arguments is to eliminate what the arguments are over.

Most wars, as far as I know, are over religion or land. If there's one unified group, there's absolutely no need to go to war with another country to take their land, as such a thing would not be possible if there were not another country.

Then there are things lesser than wars, such as racism and discrimination based on many factors such as race, religion, sex, etc. They might not be as serious as war, but they are not as simple as an argument between two people. They would equally be eliminated if there were not such differences.